CN2741686Y - Slope end surface cold extruding combined concave mold - Google Patents
Slope end surface cold extruding combined concave mold Download PDFInfo
- Publication number
- CN2741686Y CN2741686Y CN 200420117914 CN200420117914U CN2741686Y CN 2741686 Y CN2741686 Y CN 2741686Y CN 200420117914 CN200420117914 CN 200420117914 CN 200420117914 U CN200420117914 U CN 200420117914U CN 2741686 Y CN2741686 Y CN 2741686Y
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- concave mold
- die
- end surface
- mold
- interference
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Abstract
The utility model relates to a slope end surface cold extruding combined concave mold, belonging to the field of the cold extruding concave mold structure design. The utility model is characterized in that an inner layer concave mold (4) is positioned in a strengthen ring (3), the upper end surface of the inner layer concave mold (4) is designed as an inwards oblique slope end surface (2), an included angle between the slope end surface and the horizontal surface is alpha (1), and the outer diameter of the inner layer concave mold is larger than the inner diameter of the strengthen ring (3), that is, existing a definite magnitude of interference. According to the extruded materials are different, the different mold materials are selected; using the magnitude of interference design matching, two concentric circles or a plurality of concentric circles are tightly sheathed together, so as to form a multilayer prestressing force structure. Due to the result of the prepressing matching function, the stress in the concave mold tends to be uniform at work, and the mold materials obtain the sufficient application, improving the strength of the concave mold.
Description
Technical field:
The utility model relates to a kind of angled end-face cold extrusion combined die, belongs to the Structure Design of Cold Extruding Die field.
Background technology:
Existing cold extrusion die mainly contains two kinds:
A kind of is solid die.Solid die adopts monolithic construction, is convenient to processing.But whole die only is applicable to the extruding of parts such as the fine aluminium, red copper of simple shape, and when being used for pushing mild steel, insufficient strength very easily produces longitudinal crack, and economy is relatively poor.
Another kind is a combined die.Combined die is to utilize interference fit, the tight cover of two or more concentric drums is got up, forms the prestressed structure of a multilayer, with in the part or all of setoff course of work since in be pressed in the working stress that produces on the die inwall, stress distribution when improving die work improves mould strength.
The structure of combined die constitutes by holding material and shaping two parts, and the version of forward extrusion combined die mainly contains four kinds.
1, the internal layer die is all-in-one-piece combined die, and is simple in structure, makes easy for installationly, but often because corner stress is concentrated greatlyyer, easily produces cracking, uses wideless.
2, the combined die vertically cut apart of die cavity adopts interference fit between little die of innermost layer and the recipient, and the magnitude of interference generally should be greater than 0.02mm.
3, the internal layer die is made the combined die of horizontal partition formula.
4, internal layer die and stiffening ring are all made the combined die of horizontal partition formula.
More than various combined dies owing between internal layer die and stiffening ring and each layer stiffening ring magnitude of interference is had relatively high expectations, under the prerequisite of certain magnitude of interference, should be on the structural design further raising prestress value, to improve the mould bearing capacity.
Summary of the invention:
The utility model purpose is: improve the structure of existing combined die, a kind of, angled end-face cold extrusion combined die with desirable stress distribution and long service life higher at the certain prerequisite lower prestress of the magnitude of interference is provided.
The utility model is to realize above-mentioned purpose by following technical solution.
In angled end-face cold extrusion combined die, internal layer die (4) is placed in the stiffening ring (3), and its upper surface is designed to intilted angled end-face (2), angle between its angled end-face and the horizontal plane is α (1), the external diameter of internal layer die (4) is slightly larger than the internal diameter of stiffening ring (3), promptly has certain magnitude of interference therebetween.
The utility model compared with prior art has following beneficial effect: analyze from loading angle and structure, each layer outer wall lifting surface area of angled end-face cold extrusion combined die is bigger, strengthen the gap of inside and outside wall area, promptly increase end face inclination alpha (1), can make its prestressing force become big, under the situation that requires same pretension stress, requirement to the magnitude of interference is just less, just lower to the requirement of die pretension, thus the difficulty that die assembles reduced, and help to improve the integrated carrying ability of mould.
Description of drawings:
Fig. 1 is the overall construction drawing of angled end-face cold extrusion combined die.
Fig. 2 is the three-dimensional structure diagram of angled end-face cold extrusion combined die.
The specific embodiment:
In the drawings, 1 is the end face inclination alpha, 2. angled end-face, 3. stiffening ring, 4. internal layer die.
This angled end-face cold extrusion combined die is made up of stiffening ring (3), internal layer die (4), internal layer die (4) is placed in the stiffening ring (3), and its upper surface is designed to intilted angled end-face (2), angle between its angled end-face and the horizontal plane is α (1), the external diameter of internal layer die (4) is slightly larger than the internal diameter of stiffening ring (3), its difference is the magnitude of interference, uses hot charging or cold-press method internal layer die (4) and stiffening ring (3) are assembled together.
In actual applications, should select different die materials according to the difference that is extruded the part material, utilize the interference design to cooperate, the tight cover of two or more concentric circles is got up, form the prestressed structure of a multilayer, promptly between cylinder, produce interactional pretightning force, promptly assembled pressure.Under the effect of assembling pressure, produce circumferential compressive force on the internal layer die, become prestressing force, then produce tangential stress on the stiffening ring, its maximum all is positioned at the inner surface place of each layer.During extruding, working inner pressure is superimposed at tangential stress and prestressing force that the die inner surface produces, tangential stress is reduced greatly, even offset fully.Prestressed size is determined by preload pressure, and preload pressure depends on the magnitude of interference of cooperation.Because the existence of inclination alpha, the outer wall area of stiffening ring and internal layer die will be greater than inner wall area, and under the certain condition of the magnitude of interference, prestress value will be improved like this, thereby improve the bearing capacity of mould.Under the situation that requires same pretension stress, just less to the requirement of the magnitude of interference, just lower to the requirement of die pretension, thus reduced the difficulty of assembling.Can determine the magnitude of interference, be press-fitted under the pretension state of back the parameters such as actual pressure under in working order of each point in the stress and combinatorial cylinders according to the compatibility of deformation between internal layer die and stiffening ring relation.Therefore, because the exercising result of pre-interference fit can make the stress in the die be tending towards evenly, mold materials is used fully, and the intensity of mould improves greatly.
Claims (2)
1, a kind of angled end-face cold extrusion combined die of forming by stiffening ring (3) and internal layer die (4), it is characterized in that internal layer die (4) is placed in the stiffening ring (3), and its upper surface is designed to intilted angled end-face (2), the angle between its angled end-face and the horizontal plane is α (1).
2, angled end-face cold extrusion combined die according to claim 1 is characterized in that the external diameter of internal layer die (4) is slightly larger than the internal diameter of stiffening ring (3), promptly exists certain magnitude of interference therebetween.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420117914 CN2741686Y (en) | 2004-10-21 | 2004-10-21 | Slope end surface cold extruding combined concave mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420117914 CN2741686Y (en) | 2004-10-21 | 2004-10-21 | Slope end surface cold extruding combined concave mold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2741686Y true CN2741686Y (en) | 2005-11-23 |
Family
ID=35477160
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420117914 Expired - Fee Related CN2741686Y (en) | 2004-10-21 | 2004-10-21 | Slope end surface cold extruding combined concave mold |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2741686Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101920434A (en) * | 2010-07-23 | 2010-12-22 | 湖州欧亚轴承配件厂 | Method for preparing universal joint bearing outer ring and bearing outer ring mold adopted by method |
| CN101972792A (en) * | 2010-10-22 | 2011-02-16 | 南京迪威尔重型锻造股份有限公司 | Hot reverse-extrusion forming mold for large cup shell |
| CN102335707A (en) * | 2011-08-19 | 2012-02-01 | 江苏森威精锻有限公司 | Large-diameter die with requirements on positions of inner ring and outer ring and processing method thereof |
| CN103785702A (en) * | 2014-01-22 | 2014-05-14 | 合肥工业大学 | Vortex extrusion type large-plastic deformation device |
| CN106862459A (en) * | 2017-03-22 | 2017-06-20 | 重庆交通大学 | With the prestressed assembling die of longitudinal multilayer |
-
2004
- 2004-10-21 CN CN 200420117914 patent/CN2741686Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101920434A (en) * | 2010-07-23 | 2010-12-22 | 湖州欧亚轴承配件厂 | Method for preparing universal joint bearing outer ring and bearing outer ring mold adopted by method |
| CN101972792A (en) * | 2010-10-22 | 2011-02-16 | 南京迪威尔重型锻造股份有限公司 | Hot reverse-extrusion forming mold for large cup shell |
| CN101972792B (en) * | 2010-10-22 | 2012-01-25 | 南京迪威尔重型锻造股份有限公司 | Hot reverse-extrusion forming mold for large cup shell |
| CN102335707A (en) * | 2011-08-19 | 2012-02-01 | 江苏森威精锻有限公司 | Large-diameter die with requirements on positions of inner ring and outer ring and processing method thereof |
| CN102335707B (en) * | 2011-08-19 | 2014-08-27 | 江苏森威精锻有限公司 | Large-diameter die with requirements on positions of inner ring and outer ring and processing method thereof |
| CN103785702A (en) * | 2014-01-22 | 2014-05-14 | 合肥工业大学 | Vortex extrusion type large-plastic deformation device |
| CN106862459A (en) * | 2017-03-22 | 2017-06-20 | 重庆交通大学 | With the prestressed assembling die of longitudinal multilayer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |